The description of the word you requested from the astronomical dictionary is given below.
A moon of 64 km diameter at about 62,700 km from the planet Uranus. The gravity at its surface is about 0.0012 times as strong as on Earth. The moon goes once around its planet in about 11.4 hours. The moon was discovered in 1986. Also called UX (Uranus ten). Its provisional designation was S/1986 U6.